Table 1 The French Federation of Cancer Center Sarcoma Group grading system
From: Scrotal wall leiomyosarcoma: a case report and review of the literature
| Â | Tumor differentiation | Mitotic count | Tumor necrosis |
|---|---|---|---|
Score 0 | – | – | No necrosis |
Score 1 | Sarcomas that closely resemble normal adult mesenchymal tissues | 0–9 mitoses/10 HPF | < 50% tumor necrosis |
Score 2 | Sarcomas for which histologic typing is certain | 10–19 mitoses/10 HPF | ≥ 50% tumor necrosis |
Score 3 | Embryonal and undifferentiated sarcomas, synovial sarcoma, and sarcomas of uncertain differentiation | ≥ 20 mitoses/10 HPF | – |
Total score | 2 or 3 | Grade 1 (low grade) | |
4 or 5 | Grade 2 (intermediate grade) | ||
6, 7, or 8 | Grade 3 (high grade) | ||